--- a/ttml1/spec/ttml1.xml	Thu Sep 05 17:03:04 2013 -0600
+++ b/ttml1/spec/ttml1.xml	Thu Sep 05 20:31:56 2013 -0600
@@ -1750,13 +1750,13 @@
 instance;</p>
 </item>
 </ulist>
-<p>When a <el>tt:profile</el> element appears within a TTML <emph>Document Instance</emph>,
+<p>When a <el>ttp:profile</el> element appears within a TTML <emph>Document Instance</emph>,
 its purpose is to express authorial intentions about which
 features and extensions must or may be supported by a recipient
 content processor. In addition, the element indirectly expresses
 information about the set of features or extensions that are (or may
 expected to be) used by the <emph>Document Instance</emph>.</p>
-<p>When a <el>tt:profile</el> element is used by a TTML <emph>Profile Definition Document</emph> instance,
+<p>When a <el>ttp:profile</el> element is used by a TTML <emph>Profile Definition Document</emph> instance,
 it serves to publish a machine
 readable specification of a specific TTML profile, of which
 this specification defines three such <emph>Profile Definition Documents</emph> in

--- a/ttml2/spec/ttml2.xml	Thu Sep 05 17:03:04 2013 -0600
+++ b/ttml2/spec/ttml2.xml	Thu Sep 05 20:31:56 2013 -0600
@@ -1865,7 +1865,7 @@
 instance;</p>
 </item>
 </ulist>
-<p>When a <el>tt:profile</el> element appears within a TTML <loc href="#terms-document-instance">document instance</loc>,
+<p>When a <el>ttp:profile</el> element appears within a TTML <loc href="#terms-document-instance">document instance</loc>,
 its purpose is to express authorial intentions about which
 features and extensions must or may be supported by a recipient
 content processor, as well as which features and extensions must
@@ -1873,7 +1873,7 @@
 In addition, the element indirectly expresses
 information about the set of features or extensions that are (or may
 expected to be) used by the <loc href="#terms-document-instance">document instance</loc>.</p>
-<p>When a <el>tt:profile</el> element is used by a TTML <loc href="#terms-profile-definition-document">profile definition document</loc> instance,
+<p>When a <el>ttp:profile</el> element is used by a TTML <loc href="#terms-profile-definition-document">profile definition document</loc> instance,
 it serves to publish a machine
 readable specification of a specific TTML profile, of which
 this specification defines three such <emph>Profile Definition Documents</emph> in